1.  repay(v = verb.possession) give back, refund, return - pay back; "Please refund me my money"
is one way to pay
Derived forms noun repayment₁, noun repayment₂
Sample sentences: They repay the money to them ; They repay them the money

2.  repay(v = verb.possession) requite - make repayment for or return something;
is one way to give
Derived forms noun repayment₁, noun repayment₂
Sample sentences: Somebody ----s something

3.  repay(v = verb.possession) pay back, reward - act or give recompense in recognition of someone's behavior or actions;
is one way to act, move
Sample sentences: Somebody ----s something; Somebody ----s somebody; Somebody ----s somebody with something

4.  repay(v = verb.communication) come back, rejoin, retort, return, riposte - answer back;
is one way to answer, reply, respond
Sample sentences: Somebody ----s; Somebody ----s that CLAUSE

1.  To pay back; to refund; as, to repay money borrowed or advanced. [1913 Webster]
"If you repay me not on such a day,
In such a place, such sum or sums." [1913 Webster]

2.  To make return or requital for; to recompense; -- in a good or bad sense; as, to repay kindness; to repay an injury. [1913 Webster]
"Benefits which can not be repaid . . . are not commonly found to increase affection." [1913 Webster]

3.  To pay anew, or a second time, as a debt. [1913 Webster]

repay, v. (past and past part. repaid)
1 tr. pay back (money).
2 tr. return (a blow, visit, etc.).
3 tr. make repayment to (a person).
4 tr. make return for; requite (a service, action, etc.) (must repay their kindness; the book repays close study).
5 tr. (often foll. by for) give in recompense.
6 intr. make repayment.

Derivative:
repayable adj. repayment n.

Etymology:
OF repaier (as RE-, PAY(1))

VB  pay, defray, make payment, paydown, pay on the nail, pay ready money, pay at sight, pay in advance, cash, honor a bill, acknowledge, redeem, pay in kind, pay one's way, pay one's shot, pay one's footing, pay the piper, pay sauce for all, pay costs, do the needful, shell out, fork out, cough up, fork over, come down with, come down with the dust, tickle the palm, grease the palm, expend, put down, lay down, discharge, settle, quit, acquit oneself of, foot the bill, account with, reckon with, settle with, be even with, be quits with, strike a balance, settle accounts with, balance accounts with, square accounts with, quit scores, wipe off old scores, clear off old scores, satisfy, pay in full, satisfy all demands, pay in full of all demands, clear, liquidate, pay up, pay old debts, disgorge, make repayment, repay, refund, reimburse, retribute, make compensation, pay by credit card, put it on the plastic.

VB  reward, recompense, repay, requite, remunerate, munerate, compensate, fee, pay one's footing, make amends, indemnify, atone, satisfy, acknowledge, get for one's pains, reap the fruits of, tip.